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Why does a car take so long to warm up?

Updated: 12/15/2022
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12y ago

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Car heating systems usually rely on the excess heat generated by the engine to heat the passenger compartment.

There's a thing that looks just like a small radiator that sits in a fan shroud underneath the dash. When the engine has gotten warm, the coolant liquid that circulates through the engine and this little radiator also gets warm.

And by having a fan blow air through the radiator, you get warm air that can be directed out through the vents in the dash into the passenger compartment of the car.

There's a lot of metal in the engine that needs to heat up before the coolant is warm enough to heat the radiator enough for it to heat the air that you can send out into the cab.

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